Harden HfFileSystem glob: fix Windows path splitting, add try/except

- Use str.rsplit("/", 1) instead of os.path.split to extract filenames
  from HfFileSystem paths. HfFileSystem always returns POSIX-style paths,
  but os.path.split uses the OS separator, so on Windows the entire path
  was returned as the "filename" and the config name comparison always
  failed.
- Wrap the HfFileSystem().glob() call in try/except to gracefully handle
  network failures (offline mode, timeouts, unreachable Hub). On failure
  both_exist stays False, which is the safe default.

unsloth/models/loader.py

@@ -508,7 +508,7 @@ class FastLanguageModel(FastLlamaModel):
             model_type = model_types
 
         # New transformers need to check manually.
-        if SUPPORTS_LLAMA32:
+        if SUPPORTS_LLAMA32 and is_model and is_peft:
             # Check if folder exists locally
             if os.path.isdir(model_name):
                 exist_adapter_config = os.path.exists(
@@ -517,14 +517,19 @@ class FastLanguageModel(FastLlamaModel):
                 exist_config = os.path.exists(os.path.join(model_name, "config.json"))
                 both_exist = exist_adapter_config and exist_config
             else:
-                # Because HfFileSystem assumes linux paths, we need to set the path with forward slashes, even on Windows.
-                files = HfFileSystem(token = token).glob(f"{model_name}/*.json")
-                files = list(os.path.split(x)[-1] for x in files)
-                if (
-                    sum(x == "adapter_config.json" or x == "config.json" for x in files)
-                    >= 2
-                ):
-                    both_exist = True
+                # HfFileSystem returns POSIX paths; use str.rsplit to extract
+                # filenames correctly on all platforms (os.path.split uses the
+                # OS separator which breaks on Windows).
+                try:
+                    files = HfFileSystem(token = token).glob(f"{model_name}/*.json")
+                    files = [x.rsplit("/", 1)[-1] for x in files]
+                    if (
+                        sum(x == "adapter_config.json" or x == "config.json" for x in files)
+                        >= 2
+                    ):
+                        both_exist = True
+                except Exception:
+                    pass
 
         if not is_model and not is_peft:
             error = autoconfig_error if autoconfig_error is not None else peft_error
@@ -1282,7 +1287,7 @@ class FastModel(FastBaseModel):
             os.environ["UNSLOTH_DISABLE_STATIC_GENERATION"] = "1"
 
         # New transformers need to check manually.
-        if SUPPORTS_LLAMA32:
+        if SUPPORTS_LLAMA32 and is_model and is_peft:
             # Check if folder exists locally
             if os.path.isdir(model_name):
                 exist_adapter_config = os.path.exists(
@@ -1291,13 +1296,19 @@ class FastModel(FastBaseModel):
                 exist_config = os.path.exists(os.path.join(model_name, "config.json"))
                 both_exist = exist_adapter_config and exist_config
             else:
-                files = HfFileSystem(token = token).glob(f"{model_name}/*.json")
-                files = list(os.path.split(x)[-1] for x in files)
-                if (
-                    sum(x == "adapter_config.json" or x == "config.json" for x in files)
-                    >= 2
-                ):
-                    both_exist = True
+                # HfFileSystem returns POSIX paths; use str.rsplit to extract
+                # filenames correctly on all platforms (os.path.split uses the
+                # OS separator which breaks on Windows).
+                try:
+                    files = HfFileSystem(token = token).glob(f"{model_name}/*.json")
+                    files = [x.rsplit("/", 1)[-1] for x in files]
+                    if (
+                        sum(x == "adapter_config.json" or x == "config.json" for x in files)
+                        >= 2
+                    ):
+                        both_exist = True
+                except Exception:
+                    pass
 
         if not is_model and not is_peft:
             error = autoconfig_error if autoconfig_error is not None else peft_error